Can be a bone or ligament injury
Thanks for posting your query.
You must have hurt your internal structures in knee, which are anterior/posterior cruciate ligament
, medial/lateral collateral ligament, medial and lateral menisci, joint capsule, synovium, crossing muscles, bone cartilage
and bone itself. It needs proper clinical examination and relevant investigations to diagnose which among these is hurt.
You might benefit by consulting your orthopedician who can examine you , and order a Knee X-ray and MRI
to know the exact cause and provide the proper treatment for it.
A pair of knee supports can add to stability. But that again depends on your exact condition. If you don't get relief, proceed with MRI.
I hope this answers your query.
In case you have additional questions or doubts, you can forward them to me, and I shall be glad to help you out.
Wishing you good health.
Dr. Praveen Tayal.
For future query, you can directly approach me through my profile URL http://bit.ly/Dr-Praveen-Tayal